Good evening everyone. I have joined this group to hopefully call upon the experience and expertise of members. My questions surrounds a case i have been asked to give an opinion on. Obviously for legal reasons i cannot divulge too much information, so i apologise in advance if details are a little scant. The case surrounds a murder in an Eastern European country almost 10 years ago. It involves two persons allegedly using the same type of weapon at the same time, it is alleged that they concealed the weapons ion question under heavy over clothing (no weapons was seen by witnesses), it is further alleged that both used a ladder from which to fire into a gap of less than 20cm. The ballistics expert has identified that two weapons were used and has identified the rounds as being 7.62mm ammunition. However where i have difficulty in offering an opinion rests with the description of the weapons They have been described as" '56 caliber 7.62mm Machine guns" I am baffled by this description, and wonder could anyone shed any light on this description. I am ex Uk military and have a reasonable understanding of weapons of the 7.62mm caliber range both UK and foreign types, my initial thought the experts description was a typing error, but this description has been used several times in his report. If anyone could offer any help i would most appreciative. Many thanks in advance.